INFO：rcu_sched检测到CPU /任务上的停顿

我有一个AMD FX 8320 8核CPU，我已经变成了我的主文件服务器。 我没有任何问题就安装了Ubuntu Server 16.04。 我还安装了KVM / Quem并测试了使用virt-manager从另一台机器安装VM。 一切顺利。 我也设置了Samba，一切顺利。

当系统空闲或闲置一段时间后，我会收到以下消息。 当我用作Ubuntu桌面时，同样的硬件工作正常。 唯一的区别是我没有为Nvidia卡安装驱动程序，因为它是无头服务器。 为了消除可能性，我正在从终端安装Nvidia驱动程序但我无法完成，因为系统在安装过程中冻结。

有谁知道可能导致下面的错误或如何解决？

Jul 20 14:56:34 ubuntuNAS kernel: [10214.273076] INFO: rcu_sched detected stalls on CPUs/tasks: Jul 20 14:56:34 ubuntuNAS kernel: [10214.276215] 2-...: (1 GPs behind) idle=773/1/0 softirq=6581/6581 fqs=1 Jul 20 14:56:34 ubuntuNAS kernel: [10214.280069] (detected by 0, t=1500168 jiffies, g=3026, c=3025, q=17432) Jul 20 14:56:34 ubuntuNAS kernel: [10214.283337] Task dump for CPU 2: Jul 20 14:56:34 ubuntuNAS kernel: [10214.283340] swapper/2 R running task 0 0 1 0x00000008 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283346] ffff88040c6bfe70 0000000000000018 000000001ec93b00 000003d41387e046 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283351] ffffffff81f36140 ffff88040c6c0000 ffff8804069a0000 ffffffff81eb4ec0 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283356] ffff88040c6bc000 ffff88040c6bfeb8 ffffffff816c3de7 ffff88040c6bfed0 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283360] Call Trace: Jul 20 14:56:34 ubuntuNAS kernel: [10214.283371] [] ? cpuidle_enter+0x17/0x20 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283377] [] ? call_cpuidle+0x32/0x60 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283382] [] ? cpuidle_select+0x13/0x20 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283387] [] ? cpu_startup_entry+0x290/0x350 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283392] [] ? start_secondary+0x154/0x190 Jul 20 14:56:34 ubuntuNAS kernel: [10214.283397] rcu_sched kthread starved for 1500168 jiffies! g3026 c3025 f0x2 s3 ->state=0x0 

而这些消息：

 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.418285] INFO: task (snap):4351 blocked for more than 120 seconds. Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.418886] Not tainted 4.4.0-31-generic #50-Ubuntu Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.419641] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421537] (snap) D ffff8800d89dbcf8 0 4351 1 0x00000000 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421542] ffff8800d89dbcf8 ffff8800d89dbdd0 ffff88040c6b2940 ffff88040c65c4c0 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421546] ffff8800d89dc000 ffffffff81e5bb44 ffff88040c65c4c0 00000000ffffffff Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421550] ffffffff81e5bb48 ffff8800d89dbd10 ffffffff81829a25 ffffffff81e5bb40 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421554] Call Trace: Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421560] [] schedule+0x35/0x80 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421565] [] schedule_preempt_disabled+0xe/0x10 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421569] [] __mutex_lock_slowpath+0xb9/0x130 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421573] [] mutex_lock+0x1f/0x30 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421577] [] cgroup_kn_lock_live+0x3d/0xd0 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421591] [] __cgroup_procs_write+0x60/0x2f0 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421615] [] ? do_filp_open+0xa5/0x100 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421633] [] cgroup_procs_write+0x14/0x20 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421645] [] cgroup_file_write+0x3f/0x100 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421662] [] kernfs_fop_write+0x11d/0x170 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421682] [] __vfs_write+0x18/0x40 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421703] [] vfs_write+0xa9/0x1a0 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421722] [] SyS_write+0x55/0xc0 Jul 20 14:28:21 ubuntuNAS kernel: [ 8520.421743] [] entry_SYSCALL_64_fastpath+0x16/0x71 

这个：用所有8个核心的类似消息替换X：

[14048.299498] NMI watchdog: BUG: soft lockup -CPU#X stuck for 22s! [systemd-udevd:13603]

当最后一条消息正在运行时，我无法对系统执行任何操作。 它被冻结了，CPU风扇加速超高，我无法用它做任何事情。